Ointment-mill.



W. 0. KAISER.

OINTMENT MILL.

APPLICATION FILED JUNE 22,1908.

Patented Mar. 23, 1909.

WILLIAM KAISER, OF B'URLINTON, IOWA.

OINTMENT-MILL.

Specification of Letters Patent.

Patented March 23, 1909.

Application filed June 22, 19 08. Serial No. 439,835.

To all whom it may concern:

Be it known that 1, WILLIAM O. KAISER, a citizen of the United States, residing at Burlington, in the county of Des Moines and State of Iowa, have invented a new and useful Ointment-Mill, of which the following is a specification.

This invention is an improved machine for grinding or preparing ointments, espe' cially those commonly prescribed by physicians in which gritty insoluble chemicals are to be combined with a fatty base to form a smooth and non-gritty ointment free from any lumps either of ointment base or.

incorporated materials.

The novel machine may be put to general use in ointment making, but is particularly designed for use on prescription counters by druggists, and it is adapted to receive the roughly made ointment, crush and grind the hard insoluble particles with the fatty ointment base and produce a perfectl smooth ointment and de iver it in a finishe uniform condition.

I will now describe the invention indetail with reference to the accompanying drawings in which Figure 1 is a lug or guard piece. Fig. 2 is a side view of the complete machine part of one side frame being broken away. Fig. 3 is a top plan view thereof. Fig. i is a part section and part topplanet the machine. Fig. 5 is a detail sectional view of the grinding bed, its supporting frame, and adjusting devices. Fig. 6 is a top plan view tl'iereof.

The machine comprises a frame consisting preferably of metal side pieces S secured to .wooden end pieces R by means of screws.

Mounted in suitable bearings in the side pieces S at the center of the frame are two grinding rolls A and B. The shaft 6 of roll B may be mounted in fixed bearings, but the shaft (1- of roll A is preferably mounted in movable boxes P mounted in slots in the side ieces S and normally pressed toward roll l by suitable springs, rubber springs 1) being shown, interposed between the boxes and the outer ends of the slots, as indicated in the drawings.

The rolls A, B, may be of any suitable material, preferabl 7 of ground glass. Roll B may be rotated y a crank 0 attached to one end of the shaft b or any other suitable means, and motion may betransmitted from roll B to roll A by intermeshin gears M and N on the shafts of the rolls, the gears being of such relative size that roll A is drivenbetween the sides of the rolls and said guard pieces forming a pocket or hopper in which the materials to beground are placed. At the outer side of each rollthe frame may be provided with a wooden block R on which is placed a glass plate R On one of these plates R can be placed the materials tobe com ounded, and on the other plate the finishec ointmentis delivered.

Underneath the roll A is a grinding bed H which is preferably composed of glass and has a concave upper surface fitting the periphery of roll A except that the inner edge of the grinding bed is slightly ground away as indicated to form an opening it which allows the film of ointment on the roll A to pass onto bed H and be ground between the contacting surfaces of the bed H and roll A. The grinding bed'H is supported on the inner end of a lever F which is preferably made of resilient metal and. has trunnions L by which and thereby oscillate lever F and slightly raise or lower the bed H. The frame F is preferably made of steel so its trunnions can be disengaged from the side pieces by laterally compressing the frame enabling the bed H to be easily removed for cleaning.

At the outer side of roll A and above the adjacentplate R is a scraper D which carried by spring rods Z that pass below the plate R and are secured to the edges of the wooden blocks R as shown, so as to hold the lower edge of the scraper D in yielding it is pivotally mounted on the side pieces S pieces 0 and the rolls; or the materials for I the ointment may be placed directly in said hopper. The rolls are then rotated by crank O, or, other suitable means, and turn inward toward each other thereby causing 3 the ointment placed between them to take l up a rolling motion and a thin film of the 2 material adheres to each roller, and'hecause l of the difference in peripheral speed of the j rollers the small hard insoluble particles which are to be incorporated with the fatty ointment base are, crushed and partially ground. The film of ointment on roll A is then/carried on between the roll and bed ll. The fineness of the grinding being regulated by the pressure of the bed against the roll. l After passing bed H the finished ointment is removed from the surface of roll A by the scraper D and drops therefrom onto the right-hand plate R Having described my invention what I claim as new and desire to secure by Letters 1 Patent thereon is: v 1. In an ointment grinding mill the combination of a frame, a pair of rolls journaled l therein, means for pressing one of said rolls yieldingly toward the other, gearing for (.lriving said rolls at di'llercnt eripheral speeds, and guard pieces between t e rolls at the ends thereof and forming therewith an co-acting with the last roll, a scraper beside the inst roll, and means for holding said scraper 1n yielding contact with said roll.

'2. In an ointment grinding mill the combination of a frame, a pair of rolls journaled therein, means for pressing one of said rolls yieldingly toward the other, gearing for driving said rolls at dill'ercnt peripheral speeds, a scraper and means for holding said scraper against the outer side of the fast roll; with a grinding bed arranged beneath and contacting with the lu t roll, and means for l adjusting the pressure of such bed against said roll.

3. in an. ointment grinding mill the comyicldingly toward the other, gearing [or driving said rolls at diilcrcnt peripheral speeds, guard pieces projecting between the rolls at the ends thereof and forming with the upper parts of the rolls an ointment re 1 cciving hopper, a scraper at the outer side of the fast roll, means for holding said scraper in yielding contact with said roll; a yicldnhle grinding bed arranged beneath the last roll, and means for adjusting the pressure of said bed against said last roll.

' WllilalAid liAlSlQli.

Witnesses:

Osoan limnn,

binatlon of a frame, a pair of rolls journalcd I E therein, means for pressing one ol' said rolls 

